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A study of dual polymer conditioning of aluminum-based drinking water treatment residual
Author(s)
Date Issued
2007-01
Date Available
2011-09-23T13:59:35Z
Abstract
Conditioning of an alum-based water treatment sludge by single and dual polymers was investigated in this study. Capillary suction time (CST), specific resistance to filtration (SRF) and settling rate of conditioned sludge were used to evaluate the sludge dewatering characteristics. Sludge dewaterability resulting from single and dual polymer conditioning were compared for the purpose of exploring the validity and effectiveness of dual polymer conditioning strategy. Unlike activated sludge derived from wastewater treatment, results from this study have demonstrated that conditioning of the alum sludge by the combined use of an cationic polymer (FO-4140) followed by an anionic polymer (LT-25) does not exhibit considerable advantage in further improvement of sludge dewaterability with comparison of single polymer conditioning. This study supports the view that for alum-based water treatment sludge, inter particle bridging seems to be the dominative mechanism and the charge neutralization plays a less important role in the conditioning process. In addition, an intrinsic relationship between CST and SRF was deducted and tested via the experimental data obtained from the study.
Sponsorship
Not applicable
Type of Material
Journal Article
Publisher
Taylor & Francis
Journal
Journal of Environmental Science and Health, Part A: Toxic/Hazardous Substances & Environmental Engineering
Volume
42
Issue
7
Start Page
961
End Page
968
Copyright (Published Version)
Taylor & Francis Group, LLC
Subject – LCSH
Water treatment plant residuals
Sewage sludge--Conditioning
Sewage--Purification--Filtration
Water--Purification--Filtration
Polymers
Web versions
Language
English
Status of Item
Peer reviewed
ISSN
1093-4529 (Print)
1532-4117 (Online)
This item is made available under a Creative Commons License
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